1 //===------ CompileUtils.cpp - Utilities for compiling IR in the JIT ------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/ExecutionEngine/Orc/CompileUtils.h"
10
11 #include "llvm/ADT/SmallVector.h"
12 #include "llvm/ExecutionEngine/ObjectCache.h"
13 #include "llvm/IR/LegacyPassManager.h"
14 #include "llvm/IR/Module.h"
15 #include "llvm/MC/MCContext.h"
16 #include "llvm/Object/ObjectFile.h"
17 #include "llvm/Support/Error.h"
18 #include "llvm/Support/ErrorHandling.h"
19 #include "llvm/Support/MemoryBuffer.h"
20 #include "llvm/Support/SmallVectorMemoryBuffer.h"
21 #include "llvm/Target/TargetMachine.h"
22
23 #include <algorithm>
24
25 namespace llvm {
26 namespace orc {
27
28 IRSymbolMapper::ManglingOptions
irManglingOptionsFromTargetOptions(const TargetOptions & Opts)29 irManglingOptionsFromTargetOptions(const TargetOptions &Opts) {
30 IRSymbolMapper::ManglingOptions MO;
31
32 MO.EmulatedTLS = Opts.EmulatedTLS;
33
34 return MO;
35 }
36
37 /// Compile a Module to an ObjectFile.
operator ()(Module & M)38 Expected<SimpleCompiler::CompileResult> SimpleCompiler::operator()(Module &M) {
39 CompileResult CachedObject = tryToLoadFromObjectCache(M);
40 if (CachedObject)
41 return std::move(CachedObject);
42
43 SmallVector<char, 0> ObjBufferSV;
44
45 {
46 raw_svector_ostream ObjStream(ObjBufferSV);
47
48 legacy::PassManager PM;
49 MCContext *Ctx;
50 if (TM.addPassesToEmitMC(PM, Ctx, ObjStream))
51 return make_error<StringError>("Target does not support MC emission",
52 inconvertibleErrorCode());
53 PM.run(M);
54 }
55
56 auto ObjBuffer = std::make_unique<SmallVectorMemoryBuffer>(
57 std::move(ObjBufferSV), M.getModuleIdentifier() + "-jitted-objectbuffer",
58 /*RequiresNullTerminator=*/false);
59
60 auto Obj = object::ObjectFile::createObjectFile(ObjBuffer->getMemBufferRef());
61
62 if (!Obj)
63 return Obj.takeError();
64
65 notifyObjectCompiled(M, *ObjBuffer);
66 return std::move(ObjBuffer);
67 }
68
69 SimpleCompiler::CompileResult
tryToLoadFromObjectCache(const Module & M)70 SimpleCompiler::tryToLoadFromObjectCache(const Module &M) {
71 if (!ObjCache)
72 return CompileResult();
73
74 return ObjCache->getObject(&M);
75 }
76
notifyObjectCompiled(const Module & M,const MemoryBuffer & ObjBuffer)77 void SimpleCompiler::notifyObjectCompiled(const Module &M,
78 const MemoryBuffer &ObjBuffer) {
79 if (ObjCache)
80 ObjCache->notifyObjectCompiled(&M, ObjBuffer.getMemBufferRef());
81 }
82
ConcurrentIRCompiler(JITTargetMachineBuilder JTMB,ObjectCache * ObjCache)83 ConcurrentIRCompiler::ConcurrentIRCompiler(JITTargetMachineBuilder JTMB,
84 ObjectCache *ObjCache)
85 : IRCompiler(irManglingOptionsFromTargetOptions(JTMB.getOptions())),
86 JTMB(std::move(JTMB)), ObjCache(ObjCache) {}
87
88 Expected<std::unique_ptr<MemoryBuffer>>
operator ()(Module & M)89 ConcurrentIRCompiler::operator()(Module &M) {
90 auto TM = cantFail(JTMB.createTargetMachine());
91 SimpleCompiler C(*TM, ObjCache);
92 return C(M);
93 }
94
95 } // end namespace orc
96 } // end namespace llvm
97